What does adynamic mean?
The definition of adynamic
Ad`y*nam”ic, a.
Etym: [Cf. F. adynamique. See Adynamy.]

1 (Med.)
Pertaining to, or characterized by, debility of the vital powers; weak.
2 (Physics)
Characterized by the absence of power or force. Adynamic fevers, malignant or putrid fevers attended with great muscular debility.